Improvement in paper-pulp engines



A. GARDNER.

Paper-Pulp Engines.

N0.166,519, PatentedAug. 10,18 75.

WITNESSES: l WENT:

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NJETERS, PROYO-UTHOGRAPHEE WASHINQYON. D16

NIT D STATES PATENT QFFIGE.

ALvIN GARDNER, 0E WINDSOR, oA ADA.

IMPROVEMENT IN PAPER-PULP ENGINES.

Specification forming part of Letters Patent No. 166,519, dated August10, 1875; application filed June 12, 1875.

To all whom it may concern Be it known that I, ALVIN GARDNER, ofWindsor, in the county of Richmond and Province of Quebec, Dominion ofCanada, have invented a newand useful Improvement in Pulp-Engine,ofwhich the following is a speciification:

Figure 1 is a vertical section of my improved pulp-engine, taken throughthe line 00 00, Fig.2. Fig. 2 is a top view of the same. Fig. 3 is adetail top view of the beveled wheel and ring.

Similar letters of reference indicate corresponding parts.

The object of this invention is to furnish an improved machine forreducing rags to pulp in paper-making, and which shall be simple inconstruction, and efficient in operation, reducing the rags rapidly andthoroughly.

The invention will first be fully described, and then pointed out in theclaims.

A is a box of six, more or less, sides. The sides of the box A haveflanges formed upon their side edges, and are bolted to each other, orthey are secured to each other by a framework. The bottom of the box Ainclines down ward toward its center, and has a tapering recess or wellformed in its middle part, into which is fitted a tapering ring, B. Ingrooves in the face of the tapering ring B are secured a number ofknives, b, which are set at an angle or inclination. In the cavity ofthe tapering ring B is placed a beveled wheel, 0, to the face of whichare attached knives 0 which are also set at an angle or inclination. Thebeveled wheel (1 is connected with a shaft, D, by arms 0 which areinclined, as shown in Fig. 3. The lower end of the shaft D passes downthrough a hole in the center of the bottom of the box A, and revolvesupon the upper end of a plug, E, which enters the lower end of the saidhole, and the lower end of which rests upon a lever, F. One end of thelever F is pivoted to an arm, G, attached to the box A, and to its otherend is pivoted the lower end of a rod, H, which passes up along the sideof the box A, passes through a hole in a bracket or arm, I, attached tothe side of the box A, and has a screw-thread'cut upon its upper end toreceive the hand-nut J.

- Bythis construction thewheelGcanberaised out of the ring B by raisingthe shaft D by means of the rod H and lever F.

To the top of the wheel 0 is attached a scraper, K, by which the pulp ispushed outward toward the walls of the box A. The upper part of theshaft D passes up through the hub of the'bevel-gear wheel L, with whichit is connected by a feather and groove, so that the said gear-wheel maycarry the said shaft withit in its revolution, while allowing the saidshaft to move up and down through it freely.

The gear-wheel L revolves in, and is swiveled to,bearings in thebridge-tree M, attached to the top of the box A, and to it motion isgiven from any convenient power.

In using the engine, the wheel 0 is raised, the rags to be cut areplaced beneath it in the cavity of the ring B, and the wheel is loweredupon them. As the wheel 0 is revolved the rags are cut by the knives 0'b, the inclination of the said knives preventing the cut from being madeshort, and tending to produce a pulp with a longer fiber, and thus formsa better and strongerpaper. The inclination of the arms 0 tends to drawthe pulp down through the wheel, or, in other words, makes the suctionstronger. The scraper K moves the pulp toward the walls of the box A,and enables the engine to be run more slowly, while at the same timeproducing a proper circulation of the pulp. The operation of the Wheel'Oand scraper K tends to produce a circular current in the pulp, whichcurrent is broken up by the angles of the box A, thus producing athorough mixing of the pulp. The pulp is drawn off through a valve, N,in the bottom of the box A.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. The combination, with box A, having tapered wellat the bottom, of inclined knives b 0, held, respectively, in beveledring and wheel, open inside the rim, as and for the purpose specified.

2. The combiuation of the scraper K with the polygonal box A, thetapering knife-ring B, and the beveled knife-wheel 0, open inside 7 therim, substantially as herein shown and described.

ALVIN GARDNER.

Witnesses:

D. THOMAS, W. A. WiLLIs.

